Perimeter delineator



Jan. I), 1933. N 5, BQRTNER 1393 793 PERIMETER DELINEATOR Filed Dec. 2, 1931 INVENTOR. N 5. Barf/76f ATTORNEY.

UNITED TATES PATENT oFFics NORMAN S. BOR'I'NER, OF BALTIMORE, IVIARYLAND PEBIMETER DELINE'ATOR Application filed December 2, 1931. Serial No. 578,540.

My invention relates to improvements in a center 'of the gear. This arm 16 has therein wire cross-section perimeter delineator, somea pintle 17 with an enlarged central bearing times called a wire-o-graph; and the objects surface and it is held rigidly by nut 18 on its of my improvements are to hold the wire more inner end. Lever 19 is pivoted near its end firmly and accurately, to greatly increase the on this pintle 17 and is held so that it may accuracy of the device by the use of a single, swing freely, by lock nut 20. The short end adjustable lever, to make the marker lever of lever 19 has a point 21 which approaches resilient and to make it possible to use a whole the wire axially of the wire so that wear on chart with a face free to the View of the operthe point will not change the length of the 0 ator, eXcept for the marker arm. short lever. A spring 22 holds the point in I attain these and other objects and adcontact with the wire. The long end of the vantages, which will be apparent as the delever is split near its outer end and has a scription proceeds, by the mechanism illuspencil 23 held fast by screw 24. The long trated in the accompanying drawing; in end of the lever is in two sections, held to- 15 which gether by turnbuckle 25 and lock nuts 26, one

Fig. 1 is a plan view of the device in use. on each section, so that its length may be Fig. 2 is a partial sectional view on line adjusted should the wear of point 21 cause it 22 of Fig. 1. to come nearer the fulcrum of the lever. In

Similar numerals refer to similar parts th s manner the device may be kept accurate p) 20 throughout the several views. in its prop'ortlon of enlargement.

The device is primarily designed to get an Toward the center of the long end of lever enlarged view of the exact cross-section of a 19 is a flattened section 27 which is resilient trolley wire. Views may be taken with an and is bent to give the proper friction to the interval of time between and comparison made pencil, and the flattened section also per- 25 to determine the wear and probable life of mits the pencil to be raised and removed the wire, or single views will indicate the from the chart. The gears have the same strength of the wire. radius, and a complete revolution of gear 4 A. bowed split yoke 1 at its ends has collars around gear 3, when the device is in place 2 surrounding the journals of sun-gear 3 and on the wire, will give a complete enlarged H 30 planet-gear 4. The yoke is held together by View of the perimeter of the cross-section of screws 5. Gear 3 has a. radial slot 6 with the wire. V-shape seat 7 so that the gear may be placed Since a uniform practice of putting the deunder a wire 8. Screws 9 accurately and vice on the wire may be followed, and also firmly hold the gear on the wire. The collar a uniform practice of putting the charts on 2 on the journal of gear 3 has a space between gear 4, it is possible to always know which its ends, 10, so that when the gear 4 is hangpart of the curve drawn represents the top ing down, the space coincides with the slot and bottom of the wire. 6 in the gear, and the gear may be placed Although, wire, is used throughout this from under around the wire. The gears are description and the claims, it is apparent that I accurately cut to allow as little play as posthe device is equally useful in getting a crosssible, and a double tooth 11, on gear 4 fits sectional view of any object that may be held into slot 6, so the gears may always be assemwhile point 21 is drawn around it, and it is bled just the way they had been previously. intended that wire, shall include any other Gear 4 has a knob 12 projecting from its joursuch article. 45 nal by which it may be turned around gear Many changes may be made in the device 3. Gear 4 has on its face a chart 13 held in without departing from the spirit of my in place by a collared thumb screw 14. vention and I, therefore, intend to be limited Yoke2has extending from its outer bowed only by the appended claims, and that in side the upright 15, which is extended as a connection with the above conception of the i 0 supporting arm 16 over gear 3 to near the word, wire.

I claim as new and desire to secure by Letters Patent:

1. In a wire cross-section perimeter delineator, a sun-gear, means to hold a wire axially therein, a planet-gear adapted to rotate planet-like around said sun-gear and having thereon a chart, means to hold said gears together, a pivoted lever on said means, one end of which is adapted to rest against the side of said wire and the other end of which is adapted to delineate on said chart the perimeter of the Wire cross-section upon a complete revolution of said planet-gear around said sun-gear.

2. In a wire cross-section perimeter delineator, a sun-gear, means to hold a wire axially therein, aplanet-gear adapted to rotate planet-like around said sun-gear and having on one face thereof a chart, means to hold said gears together, a pivoted lever on said means one end of which is adapted to be resiliently held against the side of said wire and the other end of which has a marker adapted to delineate on said chart the perim eter of the wire cross-section upon a complete revolution of said planet-gear around said sun-gear, said lever being adjustable lengthwise from its pivot to its marker end.

3. In a wire cross-section perimeter delineatcr, a sungear, means to hold a wire axially therein, a planet-gear adapted to rotate planet-like around said sun-gear and having on one face thereof a chart, means to hold said gears together, a pivoted lever on said means one end of which is adapted to be resiliently held against the side of said wire and the other end of which has a marker adapted to delineate on said chart the perimeter of the wire cross-section upon a complete revolution of said planet-gear around said sun-gear, said lever being flexible perpendicularly to said chart and said marker being resiliently held against said chart.

4. In a wire cross-section perimeter delineator, a sun-gear, means to hold a wire axially therein, a planet-gear adapted to rotate planet-like around said sungear, a member to hold said gears together from one side thereof, an arm on said member projecting over the other side of said sun-gear, a pivoted lever on said arm, a chart on the side of the planet-gear opposite the holding member, one end of said lever being adapted to rest against the side of said wire and the other end being adapted to delineate on said chart the perimeter of the wire cross-section upon a complete revolution of said planet-gear around said sun-gear.

5. In a wire cross-section perimeter delineator, a sun-gear and a planet-gear of the same diameter, a member to hold said gears together from one side thereof, means to hold a wire axially in said sun-gear, an arm on said member projecting over the other side of said sun-gear, a lever pivoted on said arm said planet-gear around said sun-gear.

NOR-MAN S. BORTNER. 

